Raman Characterisation of Cd1−xZnx Te Thick Polycrystalline Films Obtained by the Close-Spaced Sublimation

Znamenshchykov, Yaroslav Volodymyrovych; Kosiak, Volodymyr Volodymyrovych; Opanasiuk, Anatolii Serhiiovych; Dorda, Vitalii Oleksandrovych; Fochuk, P.M.; Medvids, A.

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Title	Raman Characterisation of Cd1−xZnx Te Thick Polycrystalline Films Obtained by the Close-Spaced Sublimation
Authors	Znamenshchykov, Yaroslav Volodymyrovych Kosiak, Volodymyr Volodymyrovych Opanasiuk, Anatolii Serhiiovych Dorda, Vitalii Oleksandrovych Fochuk, P.M. Medvids, A.
ORCID	http://orcid.org/0000-0002-6866-0414 http://orcid.org/0000-0002-1888-3935 http://orcid.org/0000-0003-2340-7957
Keywords	Сd Раман Raman Cd1−xZnx полікристалічні плівкі поликристаллические пленки Polycrystalline Films
Type	Article
Date of Issue	2017
URI	http://essuir.sumdu.edu.ua/handle/123456789/76845
Publisher	Institute of Physics of the Polish Academy of Sciences
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Citation	Raman Characterisation of Cd1−xZnx Te Thick Polycrystalline Films Obtained by the Close-Spaced Sublimation [Текст] / Y.V. Znamenshchykov, V.V. Kosyak, A.S. Opanasyuk [et al.] // Acta Physica Polonica Series a. – 2017. – 132(4). – P. 1430-1435. – DOI: 10.12693/APhysPolA.132.1430.
Abstract	In this work, we studied the Raman spectra of thick polycrystalline Cd1-xZnx Te (CZT) films with x ranged from 0.06 to 0.68. Additionally, the surface morphology and structural properties were studied in order to determine the crystalline quality of the samples. The Raman spectra had a two-mode behavior typical for CZT solid solution and showed CdTe- and ZnTe-like longitudinal and transverse optical modes. The relationship between the frequencies of CdTe- and ZnTe-related modes on x was studied. We observed the deviation of the compositional dependence of phonon mode frequencies for polycrystalline CZT films in comparison with a similar dependence for CZT single crystals. Such deviation was caused by the effect of structural defects in polycrystalline films on frequencies of vibrational modes. The values of excitation wavelength, which allow achieving of high signal-to-noise ratio on the Raman spectra of CZT films with different zinc concentration in the result of resonant enhancement of phonon modes intensities, were experimentally determined.
Appears in Collections:	Наукові видання (ЕлІТ)